5. Contact the copper nozzle of the cutting torch with the workpiece (if the
copper nozzle carries with pilot arc, the distance between the nozzle and the
workpiece is approximately 2mm), and press down the button on the cutting
torch to ignite arc. Properly raise the cutting torch, making it about 1mm
from the workpiece, and then cutting can be started.
4. Precautions
4.1
．
Operating environment
•
Use the machine in relatively dry air (humidity
≤
80%).
•
The ambient temperature should lie between -10°C and +40°C.
•
Avoid using the machine in direct sunlight or in the rain.
•
Avoid using the machine in environments that is dusty or filled with
corrosive gas.
4.2
．
Summary for safety items
1. Keep good ventilation
The size of the machine is relatively small with compact structures, and the
output current is heavy. The natural ventilation condition cannot meet the heat
radiation requirements of the components, so an axial flow fan is installed inside
the machine for forced cooling.
NOTE:
Do not cover or block the louver for ventilation on both sides and on the
front of the machine. The place that the welding machine is installed should at
least 0.3m from the surrounding objects. The ventilation condition should be
ensured to be ceaselessly improved. This is extremely important for the failure
free operation and service life of the welding machine.
2. By all means avoid overload
Overload operation is strictly forbidden. Otherwise sudden ceasing operation will
emerge during the cutting process. This is because the thermosensitive element
inside the cutting machine functions when it works at an overload. The primary
power source does not need to be cut off. Let the fan continue working to
quicken the cooling down process. The operation can be resumed when the
temperature drops to the tolerance range.
3. By all means avoid overvoltage
Consult the table of “major technical parameters” for the range of the power
supply voltage range of the cutting machine. In this case, the automatic
compensation circuit in the machine can ensure that the welding current does
not exceed the permitted level. If the supply voltage exceeds the specified value,
the components will be damaged, so please be twice as careful.
Summary of Contents for LGK-40
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